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Atmospheric transmittance of an absorbing gas. 7. Further improvements to the OPTRAN 6 approach

机译:吸收气体的大气透射率。 7.对OPTRAN 6方法的进一步改进

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We present recent improvements in accuracy to the fast transmittance-calculation procedure, Optical Path Transmittance (OPTRAN), which is used for satellite data assimilation at the National Oceanic and Atmospheric Administration. These improvements are (1) to change the absorber space used for ozone, (2) to add new predictors for each gas, and (3) to treat the water vapor line absorption and water continuum absorption as separate terms. Significant improvements in the accuracy of the OPTRAN algorithm for High-Resolution Infrared Radiation Sounders (HIRS) and the Atmospheric Infrared Sounder (AIRS) are demonstrated. The results that we show here extend a recent paper of Xiong and McMillin (2004) that describes the use of a polychromatic correction term to replace the effective transmittance concept to include additional changes that improve accuracy.
机译:我们介绍了快速透射率计算程序“光路透射率”(OPTRAN)在精度方面的最新改进,该程序用于美国国家海洋和大气管理局的卫星数据同化。这些改进是(1)更改用于臭氧的吸收器空间;(2)为每种气体添加新的预测因子;(3)将水蒸气线吸收和水连续体吸收作为单独的术语处理。展示了OPTRAN算法在高分辨率红外辐射探测器(HIRS)和大气红外探测器(AIRS)的准确性上的显着提高。我们在此处显示的结果扩展了Xiong和McMillin(2004)的最新论文,该论文描述了使用多色校正项来代替有效透射率概念,以包括提高准确性的其他更改。

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